Irradiated dusting powder



Patented Apr. 11,1939

UNITED STATES PATENT OFFICE IRRADIATED DUSTING POWDER Gustav Stux, Vienna, Austria No Drawing. Application January s, 1930, Serial No. 58,227. in Austria January 5, 1m

1 Claim.

This invention relates to irradiated dusting powder suitable more particularly for use in the to the action of chemically efi'ective light rays.

'Ihe yp um used may not be dead burned, and is pulverized extremely fine and purified before sterilization. For the purpose of sterilization the 15 powder is heated to about 100 C. preferably in a stirring or agitating devices. After having cooled down to about 60 0., the powder is then irradiated with-chemically potent rays, preferably by passing it under powerful quartz lamps in a thin layer spread out on conveyor belts. Instead of quartz lamps there can be employed any other lamps capable of'emitting ultra-violet rays.

In order to increase the efilcacy oi the dusting 25 powder produced in this manner, which, as already mentioned, is suitable not only for the treatment of the healthy skin but also for healing eczema, there can also be added to the powdered gypsum other specifically eifective sub- I 30 stances both of an inorganic and of an organic nature. This addition can be given either bei'ore, during, or alter the irradiatim with ultraviolet rays.. As an inorganic supplement there can be added for" example zinc oxide, which en- 35 hances the healing power, and as an organic,'pulverised camomile blossoms which likewise pro-- mote the healing of eczema and prevent irritatlon of the skin.

I have further found that skin irritation can be avoided entirely by using instead of gypsum amixture of gypsum and anhydrite. The term 5 anhydrite is to be understood as meaning both the natural mineral known as anhydrite and also artificial anhydrlte obtained by overburning gypsum. If a mixture of gypsum and anhydrlte be employed for the purpose of the present in- 10 vention an interaction is set up between the anhydrite and the hydrated gypsum, which does not 'exert the slightest irritation on the skin but which has a beneficial effect on herpes and discharging afi'ections and outbreaks. 'I'heefi'ect can be varied at will by altering the proportions of anhydrite and hydrated gypsum in the mixture.

It is known to use gypsum in the production of dusting powder (cl. Hager's "Handbuch der pharmazeutischen Praxis, Vol. I, 1925, page 766); the treatment of foodstuifs and remedial substances, such as fat, and lets and similar substances incorporated in ointments and creams containing or free from mineral additions, with 25 ultra-violet rays has likewise already been proposed (cf. Austrian Patents Nos. 118,782 and 121,657) It has been unknown as yet, however,

to treat dusting powder containing gypsum as the main constituent, with ultra-violet rays for 30 the purpose of enhancingits healing action I claim:

A: medicating dust-comprisinga mixture of roasted gypsum and anhydrlteirradiated by ultra-violet rays.

cus'rav s'rux 

